Outer stator for reciprocating motor and manufacturing method thereof

Abstract

An outer stator of a reciprocating compressor comprises: a bobbin formed as a ring shape and provided with a winding coil therein; an outer stator frame coupled to an outer circumferential surface of the bobbin and formed of a magnetic body in which a flux flows; a plurality of first core blocks coupled to the outer stator frame and positioned radially at one side of the bobbin; and a plurality of second core blocks coupled to the outer stator frame, facing the first core blocks, and positioned at the other side of the bobbin. Accordingly, deformation which may occur during manufacturing can be prevented, and a size of a motor can be minimized.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a stator for a reciprocating motor, and particularly, to a stator of a reciprocating motor capable of preventing deformation of a stator, which occurs during its fixation, and of reducing a size of a motor by widening an area of a magnetic flux.[0003]2. Description of the Background Art[0004]In general, a motor is used as a core driving source for most electrical and electronic products such as compressors, washing machines and electric fans. A motor receives electric energy and converts the electric energy into kinetic energy. There are a lot of kinds of motors, and it may be classified into a rotary motor that converts electric energy to a rotary force, a reciprocating motor that converts electric energy to a linear movement force, and the like.[0005]Under circumstances of requiring a linear movement, the reciprocating motor which can implement a linear movement without any special equ...

AI Technical Summary

Benefits of technology

The present invention provides a stator for a reciprocating motor that prevents deformation of the outer stator and reduces the size of the motor while maintaining the same area of the magnetic flux. This is achieved by using a bobbin with a winding coil, an outer stator frame, and first and second core blocks. The first and second core blocks are manufactured by laminating steel plates and the outer stator frame is made of soft magnetic composites. The first and second core blocks are inserted in mounting grooves provided at both sides of the outer stator frame to radially arrange them. The technical effects of this invention include preventing deformation of the outer stator and reducing the size of the motor while maintaining the same area of the magnetic flux.

Problems solved by technology

As shown, the reciprocating motor has a problem in that the core block 14 is deformed by being pressed in a central direction by molding pressure generated during injection of a molding agent and by contraction generated in hardening of a molding agent.

For this reason, a distance (t) between the outer stator 11 and the inner stator 12 gets narrowed, thereby undesirably causing collision between the stator and the mover.

Therefore, reliability and efficiency of the motor are degraded.

Also, because the injection molding method is used in an over molding process in which a winding coil is coated with an insulation material, a molded object is contracted in cooling, causing a dimensional error, and ununiformity of a product is generated by a temperature of a mold, which increases a rate of defection.

Therefore, there are several problems such as complicated manufacturing processes and an increased manufacturing cost.

Therefore, a size of the motor should be undesirably enlarged as much as the widened width.

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